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[/] [connect-6/] [trunk/] [XILINX/] [BUILD_SCC/] [SP6/] [LCD_Controller_safe.v] - Rev 17
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module LCD_Controller ( // Host Side iDATA,iRS, iStart,oDone, iCLK,iRST_N, // LCD Interface LCD_DATA, LCD_RW, LCD_EN, LCD_RS ); // CLK parameter CLK_Divide = 16; // Host Side input [7:0] iDATA; input iRS,iStart; input iCLK,iRST_N; output reg oDone; // LCD Interface output [7:0] LCD_DATA; output reg LCD_EN; output LCD_RW; output LCD_RS; // Internal Register reg [4:0] Cont; reg [1:0] ST; reg preStart,mStart; ///////////////////////////////////////////// // Only write to LCD, bypass iRS to LCD_RS assign LCD_DATA = iDATA; assign LCD_RW = 1'b0; assign LCD_RS = iRS; ///////////////////////////////////////////// always@(posedge iCLK or negedge iRST_N) begin if(!iRST_N) begin oDone <= 1'b0; LCD_EN <= 1'b0; preStart<= 1'b0; mStart <= 1'b0; Cont <= 0; ST <= 0; end else begin ////// Input Start Detect /////// preStart<= iStart; if({preStart,iStart}==2'b01) begin mStart <= 1'b1; oDone <= 1'b0; end ////////////////////////////////// if(mStart) begin case(ST) 0: ST <= 1; // Wait Setup 1: begin LCD_EN <= 1'b1; ST <= 2; end 2: begin if(Cont<CLK_Divide) Cont <= Cont+1; else ST <= 3; end 3: begin LCD_EN <= 1'b0; mStart <= 1'b0; oDone <= 1'b1; Cont <= 0; ST <= 0; end endcase end end end endmodule